NHUJK Bark Collar Smart Dog Bark Collar Small to Large Dogs Rechargeable Model AT05 Introducing the NHUJK Bark Collar, the ultimate solution for dog owners who want to train their dogs to stop barking. This smart dog collar is suitable for small to large dogs and comes in the color black. It features 5 training modes, which includes a vibration and beep mode that will alert your dog when it is barking excessively. Made from Nylon material, the NHUJK Bark Collar is durable and long-lasting. The collar is rechargeable and comes with one Lithium Ion battery, making it easy to use and maintain. The package dimensions are 3.86 x 3.03 x 2.05 inches and it weighs 5.29 ounces. The collar's closure type is also 5 training modes, ensuring that your dog will be trained effectively and humanely.